Marantz SR620 - Page 4

MODEL SR620/SR620L STEREOPHONIC RECEIVER
MODEL SR620CX STEREOPHONIC RECEIVER
MODEL SR520/SR520L STEREOPHONIC RECEIVER
INTRODUCTION
This service manual was prepared for use by Authorized
Warranty Stations and contains service information for
Marantz Model SR520/SR520L and SR620/SR620L
Stereophonic Receiver.
Servicing information and voltage data included in this
manual are intended for use by the knowledgeable and ex-
perienced technician only. All instructions should be read
carefully. No attempt should be made to proceed without
a good understanding of the operation of the Receiver.
The parts list furnishes information by which replacement
parts may be ordered from the Marantz Company. A
simple description is included for parts which can usually
be obtained through local suppliers.
1. SHOCK FIRE HAZARD SERVICE TEST
CAUTION: After servicing this appliance and prior to
returning to customer, measure the resistance between
either primary AC cord connector pins (with unit NOT
connected to AC mains and its Power switch ON), and
the face or front Panel of product and controls and cha-
ssis bottom.
Any resistance measurement less than 1 Megohms should
cause unit to be repaired or corrected before AC power is
applied, and verfied before return to user/customer.
Ref. UL Standard NO. 1270. Para. 66. 3. D (Mandatory
Test after servicing Electrical Appliances, effective 7-1-83).
2. P.W. BOARDS
As can be seen from the circuit diagram the chassis of
Model SR520/SR520L and SR620/SR620L consists of the
following units. Each unit mounted on a printed circuit
board is described within the square enclosed by a bold
dotted line on the circuit diagram.
1. Tuner/Phono/Switch . . . .mounted on P.W. Board P100
2. Power Supply. ........ mounted on P.W. Board P700
3. Tone Amp. .........-- mounted on P.W. Board PEOO
4. Speaker Switch/
Headphone .......... mounted on P.W. Board PT00
5. Power Switch. ....... mounted on P.W. Board PUQO
6. Speaker Terminal ..... mounted on P.W. Board PW0O
7. Balance Control ...... mounted on P.W. Board PGOO
8. Tape 2 Monitor....... mounted on P.W. Board PV0O
(SR620/SR620L)
9. DE-Emphasis Switch . . . mounted on P.W. Board PC50
(SR620/SR520(E) SR620(P))
10. CX Control ........ mounted on P.W. Board PDOO
11. CX Switch. ........ mounted on P.W. Board PD50
12. CAL..LED acces 8 mounted on P.W. Board PZ00
13. Ind. LED. .......... mounted on P.W. Board PZ51
(SR620(U))
14. UCOM............ mounted on P.W. Board P501
15. Display ............ mounted on P.W. Board P502
16. Key Switch ......... mounted on P.W. Board P503
17. Scan Switch. ........ mounted on P.W. Board P504
(SR620/SR520)